Fred has established himself at Shaktar Donetsk and is now being targeted by a string of big clubs

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It has become clear over the past few months that United have a shortage of quality in the holding role, with Nemanja Matic the only natural in that position.

Scott McTominay has come in over recent weeks to provide a useful alternative option, but if United are serious in their intention to challenge both in the Premier League and in Europe next season, Mourinho would still need further options.

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The report claims United have even made discreet enquiries to find out whether Fred would be open to the prospect of moving to Old Trafford, and received encouraging feedback.

And that is understood to have given them the confidence to press ahead with a serious attempt to clinch a deal with Shaktar this summer.

United see Fred as the answer to their problems in the centre of midfield

One of those is believed to be in the centre of midfield, where they were found wanting in the last-16 defeat to Real Madrid over the course of the two legs.

They would have the financial muscle to push United hard, although PSG still need to comply with Financial Fair Play regulations and the huge outlay on Kylian Mbappe is already on their books for this year.

Arsenal and Tottenham have also had scouts watching Fred in action with Shaktar, where he has established himself as a vital player since being singed five years ago.